Reducing voltage from 9v to 3v

I've got a project idea in mind. I want to make a simple, effective wireless system for a guitar using 2 walkie-talkies (audio fidelity isn't a huge issue for me, so this seems like a viable option). I'd like to connect the "receiver" to my universal power supply on my pedalboard. However, the walkie-talkie runs on 2 1.5v batteries, and the power supply outputs 9v. What would be an effective way to reduce the voltage in order to use the walkie-talkie with the power supply?

Reducing voltage from 9v to 3v

300zx: I saw that thread, but it didn't help me much, so I figured I'd sign up for this forum & just start a new thread.

micromind: Thanks! That seems like it'll work, hopefully. There's an electrical shop not too far from me; sometime next week I'll stop in & see if they've got that. What would make a suitable heatsink? I have a few I pulled from old computers, but I'm not sure if they'd work or not.

kbsparky: The short answer is, I'm broke. But, more specifically, I like building stuff like this myself sometimes. I've built instruments before, and I just got done building a speaker cabinet from extra parts, but I'm new to more advanced (i.e: any kind of) electrical work like this, so I figured this'd be a good place to look. That, and it'd be funny to tell people what my wireless system is; I already get plenty of funny & confused looks when I try to explain my live setup :D

Reducing voltage from 9v to 3v

A heatsink that's about 2" X 2" should work. If the existing mounting holes won't work, feel free to drill a new one.

I can't remember if this chip has an isolated mounting tab or not. If it doesn't, and the chip is mounted directly to the heatsink, the heatsink will be at DC-. This should be OK in your case, but if it needs to be isolated, just get a TO-220 mounting kit. Otherwise, just bolt it straight to the heatsink.